anhvinh :
*****-OEM-*******-***** 🙁
sorry bud. you will not be able to use that windows on your new PC. you could use that Hard drive, but you will need to format (wipe) it and install a new windows over it. Windows 7 Home Premium Sp1 OEM runs around 80-100 bucks. If money is an issue, you can install Linux (Ubuntu, LinuxMint, Fedora etc). And you have options there too. IF you want you can install Linux ALONGSIDE windows 7, or you can install linux OVER windows 7. side by side means you choose which OS to boot into when you turn the PC on (when you have 2 operating systems installed, it will detect that and ask you to choose between the 2). If you need to you can use linux in the new, and swap the Hard drive back into the old, if need be (booting into windows), until you can afford windows 7. If it fits in your budget, the easiest route and most sensible is to buy a new copy of windows 7 for THAT computer. (it too will be OEM)